The object to this concept is pickingone or two digits one may feel will hit in SC: 2,3,4,6,7,8, or 9.Based on this concept, the combination are listed below. There are 21 single combos with 6 doubles in each string. Doubles can be filtered out, but better with string remaining intact.

Its better playing the whole string after choosing a digit, but no, one does not have to play the whole string. Lets say you pick a string and you don't want doulbes, that will leave one with 21 combos. Now lets say I want to deflate the string even further, I would remove from the string the last 5 or 6 combo's from recent hits. Now your string is left with 15 or 16 combos, hoping a repeat combo from the ones remove does not hit. I hope this helps.

pcnut

"Wisdom is knowing what to do next, skill is knowing how to do it, and virtue is doing it."